Rainbow Electronics MAX5231 - Manual

General Description
The MAX5230/MAX5231 low-power, dual 12-bit voltage-
output digital-to-analog converters (DACs) feature an
internal 3ppm/°C precision bandgap voltage reference
and precision output amplifiers. The MAX5231 operates
on a single 5V supply with an internal 2.5V reference and
features a 4.095V full-scale output range. The MAX5230
operates on a single 3V supply with an internal 1.25V ref-
erence and features a 2.0475V full-scale output range.
The MAX5231 consumes only 470µA while the MAX5230
consumes only 420µA of supply current. Both devices
feature low-power (2µA) software- and hardware-
enabled shutdown modes.
The MAX5230/MAX5231 feature a 13.5MHz SPI™-,
QSPI™-, and MICROWIRE™-compatible 3-wire serial
interface. An additional data output (DOUT) allows for
daisy-chaining and read back. Each DAC has a double-
buffered digital input. The MAX5230/MAX5231 feature
two software-selectable shutdown output impedances:
1k
Ω or 200kΩ. A power-up reset feature sets DAC out-
puts at ground or at the midscale DAC code.
The MAX5230/MAX5231 are specified over the extended
temperature range (-40°C to +85°C) and are available in
16-pin QSOP packages.
Applications
Industrial Process Controls
Automatic Test Equipment
Digital Offset and Gain Adjustment
Motion Control
µP-Controlled Systems
Features
♦ Internal 3ppm/°C Precision Bandgap Reference
2.465V (MAX5231)
1.234V (MAX5230)
♦ 10ppm/°C (max) Full-Scale Output Range
4.095V (MAX5231)
2.0475V (MAX5230)
♦ Single-Supply Operation
5V (MAX5231)
3V (MAX5230)
♦ Low Supply Current
470µA (MAX5231)
420µA (MAX5230)
♦ 13.5MHz SPI/QSPI/MICROWIRE-Compatible,
3-Wire Serial Interface
♦ Pin-Programmable Power-Up Reset State to Zero
or Midscale Output Voltage
♦ Programmable Shutdown Modes with 1kΩ or
200k Ω Internal Output Loads
♦ Recalls Output State Prior to Shutdown or Reset
♦ Buffered Output Drives 5kΩ || 100pF Loads
♦ Space-Saving 16-Pin QSOP Package
MAX5230/MAX5231
3V/5V, 12-Bit, Serial Voltage-Output Dual DACs
with Internal Reference
________________________________________________________________ Maxim Integrated Products 1
Ordering Information
19-2332; Rev 0; 1/02
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
Functional Diagram appears at end of data sheet.
SPI and QSPI are trademarks of Motorola, Inc.
MICROWIRE is a trademark of National Semiconductor, Corp.
PART TEMP RANGE
PIN-
PACKAGE INL
(LSB)
MAX5230AEEE -40°C to +85°C 16 QSOP ±0.5
MAX5230BEEE -40°C to +85°C 16 QSOP ±1
MAX5231AEEE -40°C to +85°C 16 QSOP ±0.5
MAX5231BEEE -40°C to +85°C 16 QSOP ±1
16
15
14
13
12
11
10
9
1
2
3
4
5
6
7
8
OSA OSB
OUTB
V DD
AGND
REF
PDL
DOUT
DGND
TOP VIEW
MAX5230
MAX5231
QSOP
OUTA
RSTV
CS
DIN
CLR
LDAC
SCLK
Pin Configuration